Special thread sealing surface measuring equipment and measuring method

Abstract

The invention relates to special thread sealing surface measuring equipment and a measuring method, the measuring equipment comprises a connecting rod, a movable measuring head and a fixed measuring head, the movable measuring head and the fixed measuring head are oppositely installed on the connecting rod, and the movable measuring head can move and be positioned along the length direction of the connecting rod so as to be close to or far away from the fixed measuring head. The device has the beneficial effects that the structure is simple, the design is reasonable, the data of the sealing surface can be more accurately obtained, calculation and judgment can be automatically carried out, and the influence of human interference is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum-specific thread detection equipment, and in particular to a special thread sealing surface measuring device and a measuring method. Background Art

[0002] Oil and gas field exploitation is continuously expanding towards deep ground and deep sea areas, and this development trend has brought about an increasing demand for special thread products. In this context, pipe string assembly is one of the important links in the oil and gas exploitation process. Special threaded oil casing is formed into a pipe string through threaded connection, and the key characteristics of the pipe string are the integrity of its connection and the reliability of the seal. It is this integrity of the seal that is directly related to the safety, efficiency and environmental protection of oil and gas field exploitation. For almost all special thread products, whether on land or in deep sea environments, their sealing problems are solved by independent sealing structures. The design and quality of this sealing structure are crucial to the performance of the pipe string. It needs to ensure that it can still maintain a stable sealing effect under extreme working conditions such as high pressure and high temperature. Therefore, the inspection of the sealing surface structure of special threaded oil casing becomes particularly important.

[0003] However, in production enterprises, the sealing surface diameter inspection is usually regarded as a 100% full inspection item that must be carried out, which means that each product needs to go through a strict inspection process. This inspection usually requires measuring the average diameter and ovality of the sealing surface, but in most cases it still relies on manual operation, resulting in a large amount of inspection work, high inspection intensity, and the inspection results are easily affected by human factors. At the same time, this manual inspection method also has the problem of low efficiency, which conflicts with the goal of enterprises to pursue high efficiency and high-quality development. In this context, some backbone enterprises usually require that the inspection time of the sealing surface does not exceed 30 seconds, which to a certain extent limits the depth and accuracy of the sealing surface inspection. This may lead to the inability to achieve 100% comprehensive inspection of each product, or the inability to conduct a 360° comprehensive inspection of the sealing surface structure as required, which may introduce quality risks and may even affect the stability and safety of the entire oil and gas production system. Summary of the invention

[0004] The invention provides a special thread sealing surface measuring device and a measuring method, aiming to solve the problems in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A special threaded sealing surface measuring device comprises a connecting rod, a movable probe and a fixed probe, wherein the movable probe and the fixed probe are relatively mounted on the connecting rod, and the movable probe can be moved and positioned along the length direction of the connecting rod to approach or move away from the fixed probe.

[0007] The beneficial effects of the present invention are as follows: during the measurement process, firstly, the movable probe and the fixed probe are respectively placed on both sides of the thread surface of the oil pipe in a manner that can be thought of by a person skilled in the art, and the movable probe and the fixed probe are respectively fitted with the two sides of the thread surface of the oil pipe; then, the distance between the two sides of the thread surface of the oil pipe is obtained by the movable probe and the fixed probe, so that the measured data can be subsequently compared and analyzed with the standard parameters, thereby obtaining the measurement error.

[0008] The present invention has a simple structure and a reasonable design, can obtain the data of the sealing surface more accurately, and can automatically perform calculations and judgments, thereby greatly reducing the influence of human interference.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, it also includes a suspension mechanism, the connecting rod is fixedly mounted on the suspension mechanism, and the suspension mechanism is used to drive the connecting rod to move up and down and horizontally.

[0011] The beneficial effects of adopting the above further solution are simple structure and reasonable design. During assembly, the entire measuring device is installed on the suspension mechanism, and the position of the entire measuring device is adjusted according to the demand through the suspension mechanism, so as to measure the distance between the two sides of the thread surface of the oil pipe, and the measurement is convenient;

[0012] In addition, when no measurement is being performed, the entire measuring device can be moved to an area outside the oil operation via a suspension mechanism to prevent the measuring device from affecting the oil operation.

[0013] Furthermore, it also includes an image collector, which is fixedly mounted on the suspension mechanism.

[0014] The beneficial effect of adopting the above further scheme is that during the measurement process, first, the movable probe and the fixed probe are respectively placed on both sides of the thread surface of the oil pipe in a manner that can be thought of by a person skilled in the art, and the positions of the two probes are collected by an image collector at the same time, so that the movable probe and the fixed probe are respectively fitted with the two sides of the thread surface of the oil pipe, ensuring the accuracy of the positions of the two probes; then, the distance between the two sides of the thread surface of the oil pipe is obtained by the movable probe and the fixed probe, so that the measured data can be compared and analyzed with the standard parameters later, thereby obtaining the measurement error.

[0015] Furthermore, the image collector is a camera.

[0016] The beneficial effects of adopting the above further solution are reasonable camera selection, high acquisition efficiency and good acquisition effect.

[0017] Furthermore, it also includes a data acquisition and digital display module, the image acquisition device, the movable probe and the fixed probe are respectively connected to the data acquisition and digital display module by wireless communication, and the data acquisition and digital display module is used for communication connection with terminal equipment.

[0018] The beneficial effect of adopting the above further solution is that during the measurement process, the data collected by each component is received by the data acquisition and digital display module and sent to the terminal device for subsequent analysis, and the measurement efficiency is high.

[0019] Furthermore, the movable measuring head and / or the fixed measuring head are / is respectively in a disc-shaped structure.

[0020] The beneficial effect of adopting the above further solution is that the shapes of the movable probe and the fixed probe are reasonably designed to ensure that they fit the two sides of the thread surface of the oil pipeline and ensure the accuracy of the measurement.

[0021] Furthermore, micrometers are installed on the movable probe and the fixed probe respectively.

[0022] The beneficial effects of adopting the above further solution are simple structure and reasonable design. The distance between the movable probe and the fixed probe, that is, the distance between the two sides of the thread surface of the oil pipe can be measured by using a micrometer.

[0023] Furthermore, pressure sensors are embedded in the movable probe and the fixed probe respectively.

[0024] The beneficial effect of adopting the above further scheme is that during measurement, there must be pressure between the movable probe and the fixed probe and both sides of the threaded surface of the oil pipe, so the provision of a pressure sensor can ensure the validity of the measurement data. When there is no pressure, the measured data is invalid and needs to be discarded.

[0025] Furthermore, the pressure detection range of each pressure sensor is 1-10N.

[0026] The beneficial effect of adopting the above further solution is that the pressure detection range of the pressure sensor is reasonably selected and the measurement is convenient.

[0027] The present invention also relates to a special thread sealing surface measuring method, which is implemented by using the special thread sealing surface measuring device as described above, and includes the following specific steps:

[0028] The movable probe and the fixed probe are respectively placed on both sides of the threaded surface of the oil pipe, and the movable probe and the fixed probe are respectively fitted with the two sides of the threaded surface of the oil pipe, and the distance between the two sides of the threaded surface of the oil pipe is obtained through the movable probe and the fixed probe.

[0029] The beneficial effect of adopting the above further scheme is that the present invention provides a special thread sealing surface measurement method, which is simple, reasonably designed, can obtain the sealing surface data more accurately, and can automatically calculate and judge, greatly reducing the influence of human interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a partial structural schematic diagram of the present invention;

[0032] Figure 3 The diagram is a distribution diagram of the movable probe, the fixed probe and the oil pipe in the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Connecting rod; 2. Movable probe; 3. Fixed probe; 4. Suspension mechanism; 5. Image collector; 6. Data acquisition and digital display module; 7. Oil pipe. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0039] Example 1

[0040] like Figures 1 to 3 As shown, this embodiment provides a special threaded sealing surface measuring device, including a connecting rod 1, a movable probe 2 and a fixed probe 3, wherein the movable probe 2 and the fixed probe 3 are relatively installed on the connecting rod 1, and the movable probe 2 can be moved and positioned along the length direction of the connecting rod 1 to approach or move away from the fixed probe 3.

[0041] During the measurement process, first, the movable probe 2 and the fixed probe 3 are respectively placed on both sides of the threaded surface of the oil pipe 7 in a manner that can be thought of by a person skilled in the art, and the movable probe 2 and the fixed probe 3 are respectively fitted with the two sides of the threaded surface of the oil pipe 7; then, the distance between the two sides of the threaded surface of the oil pipe 7 is obtained by the movable probe 2 and the fixed probe 3, so that the measured data can be subsequently compared and analyzed with the standard parameters to obtain the measurement error.

[0042] Preferably, in this embodiment, the fixed probe 3 is fixed on the connecting rod 1 through a base 1.

[0043] In addition, the movable probe 2 is fixed on the base 2, and the base 2 is installed on the connecting rod 1 by bolts. The connecting rod 1 is provided with a plurality of screw holes 1 evenly spaced along its axial direction, and the base 2 is provided with a screw hole 2. When adjusting, the base 2 can be manually moved until the screw hole 2 is connected with the corresponding screw hole 1, and the base 2 and the connecting rod 1 are connected by bolts.

[0044] It should be noted that the movable probe 2 and the fixed probe 3 are both measuring probes in the prior art, and their specific structures and principles are not described in detail here.

[0045] This embodiment has a simple structure and a reasonable design, can obtain the data of the sealing surface more accurately, and can automatically perform calculations and judgments, thereby greatly reducing the impact of human interference.

[0046] Example 2

[0047] On the basis of embodiment 1, this embodiment further includes a suspension mechanism 4, the connecting rod 1 is fixedly mounted on the suspension mechanism 4, and the suspension mechanism 4 is used to drive the connecting rod 1 to move up and down and horizontally.

[0048] The scheme has a simple structure and reasonable design. During assembly, the entire measuring device is installed on the suspension mechanism 4. The position of the entire measuring device is adjusted according to demand through the suspension mechanism 4 to measure the distance between the two sides of the thread surface of the oil pipe 7, which is convenient for measurement.

[0049] In addition, when not measuring, the entire measuring device can be moved to an area outside the oil operation through the suspension mechanism 4 to prevent the measuring device from affecting the oil operation.

[0050] Based on the above scheme, the suspension mechanism 4 may include two linear modules, one of which is fixedly arranged horizontally, and the other is arranged vertically and its upper end is fixedly connected to the slider on one of the linear modules, and the entire measuring mechanism is fixedly mounted on the slider of the other linear module, that is, the connecting rod 1 is fixedly mounted on the slider of the other linear module. During measurement, the position of the entire measuring device is adjusted by the two linear modules.

[0051] It should be noted that the two linear modules are arranged above one end of the oil pipe 7 .

[0052] In addition, the suspension mechanism 4 in the drawings only shows two linear modules, but the specific details of the linear modules are not described in detail.

[0053] Alternatively, the suspension mechanism 4 is directly replaced by a bracket, in which case the bracket cannot adjust the position of the measuring device, which may affect oil operations.

[0054] Example 3

[0055] On the basis of Embodiment 2, this embodiment further includes an image collector 5 , and the image collector 5 is fixedly mounted on the suspension mechanism 4 .

[0056] During the measurement process, first, the movable probe 2 and the fixed probe 3 are respectively placed on both sides of the threaded surface of the oil pipe 7 in a manner that can be thought of by a person skilled in the art, and the positions of the two probes are simultaneously acquired by the image acquisition device 5, so that the movable probe 2 and the fixed probe 3 are respectively fitted with both sides of the threaded surface of the oil pipe 7 to ensure that the positions of the two probes are accurate; then, the distance between the two sides of the threaded surface of the oil pipe 7 is obtained by the movable probe 2 and the fixed probe 3, so that the measured data can be subsequently compared and analyzed with the standard parameters to obtain the measurement error.

[0057] Example 4

[0058] On the basis of Embodiment 3, in this embodiment, the image collector 5 is a camera.

[0059] The camera selection is reasonable, the acquisition efficiency is high, and the acquisition effect is good.

[0060] Preferably, in this embodiment, the camera is preferably a 360° panoramic camera.

[0061] It should be noted that the above-mentioned camera adopts existing technology, and its specific structure and principle will not be described in detail here.

[0062] Example 5

[0063] Based on any one of Examples 3 to 4, this embodiment also includes a data acquisition and digital display module 6, and the image acquisition device 5, the movable probe 2 and the fixed probe 3 are respectively wirelessly connected to the data acquisition and digital display module 6, and the data acquisition and digital display module 6 is used for communication connection terminal equipment (such as a computer).

[0064] During the measurement process, the data collected by each component is received by the data acquisition and digital display module 6 and sent to the terminal device for subsequent analysis, with high measurement efficiency.

[0065] The data collection and digital display module 6 adopts a wireless transmitter in the prior art.

[0066] Example 6

[0067] On the basis of the above embodiments, in this embodiment, the movable probe 2 and / or the fixed probe 3 are respectively in a disc-shaped structure.

[0068] The shapes of the movable probe 2 and the fixed probe 3 are reasonably designed to ensure that they fit the two sides of the threaded surface of the oil pipe 7 and ensure the accuracy of the measurement.

[0069] Alternatively, the movable probe 2 and the fixed probe 3 may also be arc-shaped plate structures that match the thread surface profile of the oil pipe 7 .

[0070] Example 7

[0071] On the basis of the above embodiments, in this embodiment, micrometers are respectively installed on the movable probe 2 and the fixed probe 3 .

[0072] The scheme has a simple structure and a reasonable design. The distance between the movable probe 2 and the fixed probe 3, that is, the distance between the two sides of the thread surface of the oil pipe 7, can be measured by using a micrometer.

[0073] Example 8

[0074] On the basis of the above embodiments, in this embodiment, pressure sensors are embedded in the movable probe 2 and the fixed probe 3 respectively.

[0075] During measurement, there must be pressure between the movable probe 2 and the fixed probe 3 and both sides of the threaded surface of the oil pipe 7, so the pressure sensor can ensure the validity of the measured data. When there is no pressure, the measured data is invalid and needs to be discarded.

[0076] Preferably, in this embodiment, each pressure sensor is preferably a piezoresistive pressure sensor.

[0077] Based on the above scheme, mounting grooves are respectively provided on opposite sides of the movable probe 2 and the fixed probe 3, and each pressure sensor is installed in the corresponding mounting groove, with one side of the pressure sensor flush with the notch of the corresponding mounting groove.

[0078] Example 9

[0079] On the basis of Example 8, in this embodiment, the pressure detection range of each pressure sensor is 1-10N.

[0080] The pressure detection range of the pressure sensor is reasonably selected and the measurement is convenient.

[0081] Preferably, in this embodiment, the pressure detection range of each pressure sensor is preferably 6N.

[0082] Example 10

[0083] On the basis of the above embodiments, this embodiment further provides a special thread sealing surface measurement method, which is implemented by using the special thread sealing surface measurement device as described above, and includes the following specific steps:

[0084] The movable probe 2 and the fixed probe 3 are respectively placed on both sides of the threaded surface of the oil pipe 7, and the movable probe 2 and the fixed probe 3 are respectively fitted with the two sides of the threaded surface of the oil pipe 7, and the distance between the two sides of the threaded surface of the oil pipe 7 is obtained through the movable probe 2 and the fixed probe 3.

[0085] This embodiment provides a special thread sealing surface measurement method. The measurement method is simple, reasonably designed, can obtain sealing surface data more accurately, and can automatically perform calculations and judgments, greatly reducing the impact of human interference.

[0086] This embodiment realizes the function of fully automatic 360° circumferential measurement by introducing automation technology. Compared with the traditional manual measurement method, this measuring instrument can obtain the data of the sealing surface more accurately, and can automatically calculate and judge, greatly reducing the impact of human interference. Through this innovative technology, manufacturers can better balance the detection needs of sealing surface quality and the requirements of production efficiency, thereby improving production efficiency while ensuring product quality, and achieving the goal of efficient and high-quality development.

[0087] The measurement process of the present invention is as follows:

[0088] (1) Install the suspension mechanism 4 near the threaded joint to be tested;

[0089] (2) Use the suspension mechanism 4 to drive the entire measuring device to move to the position of the threaded joint to be measured;

[0090] (3) Ensure that the movable probe 2 and the fixed probe 3 are roughly consistent with the diameter position of the threaded joint to be measured of the oil pipe 7 (the movable probe 2 and the fixed probe 3 are close to the pipe thread, but will not affect the rotation of the pipe), and adjust by visual inspection;

[0091] (4) Use a camera to capture images of the two probes to determine whether the two probes are correctly contacting the threaded joint to be tested, and ensure that the camera is parallel to the sealing surface measuring device and perpendicular to the end face of the threaded joint to be tested.

[0092] (5) Under the correct contact condition, keep the sealing surface measuring device stationary, rotate the threaded joint to be measured (i.e., rotate the oil pipe 7), and let the two measuring heads collect data at the same time.

[0093] (6) Data is considered valid only if it meets the following two conditions:

[0094] a) The built-in piezoresistive pressure sensors of the fixed probe 3 and the movable probe 2 both have force values; b) In the image captured by the visual judgment system, the probe intersects with the threaded pipe.

[0095] Based on the above content, before measurement, the standard diameter of the standard pipe is measured by the movable probe 2 and the fixed probe 3, and during measurement, the measured diameter of the oil pipe 7 is measured by the movable probe 2 and the fixed probe 3. By comparing the errors between the standard diameter and the measured diameter, the quality of the sealing surface can be more comprehensively evaluated.

[0096] The present invention provides a special thread sealing surface measuring instrument and measuring method, which introduces automation technology, and the entire measuring process is automatically completed under the guidance of the operator. Compared with the traditional manual measurement method, it can greatly improve the measurement efficiency and reduce the manual operation time. In addition, the piezoresistive pressure sensor and automatic control are used, the measurement results are more accurate, and are not affected by human factors, ensuring the consistency of the data. Through a special suspension mechanism and an automatic rotating platform, 360° circumferential measurement of the special thread sealing surface is achieved. Compared with the limited angle of traditional manual measurement, this can more comprehensively evaluate the quality of the sealing surface. The measuring instrument can judge the correct contact between the contact and the threaded joint to be measured in real time, and can issue a warning when the data does not meet the valid conditions to avoid the generation of erroneous data.

[0097] It should be noted that all electronic components involved in the present invention adopt the existing technology, and the above-mentioned components are electrically connected to the controller, and the control circuit between the controller and each component is the existing technology.

[0098] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0099] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A special thread sealing surface measuring device, characterized in that: The invention comprises a connecting rod (1), a movable measuring head (2) and a fixed measuring head (3); the movable measuring head (2) and the fixed measuring head (3) are relatively mounted on the connecting rod (1), and the movable measuring head (2) can be moved and positioned along the length direction of the connecting rod (1) to approach or move away from the fixed measuring head (3).

2. The special thread sealing surface measuring device according to claim 1 is characterized in that: It also comprises a suspension mechanism (4), the connecting rod (1) being fixedly mounted on the suspension mechanism (4), and the suspension mechanism (4) being used to drive the connecting rod (1) to move up and down and horizontally.

3. The special thread sealing surface measuring device according to claim 2 is characterized in that: It also comprises an image collector (5), wherein the image collector (5) is fixedly mounted on the suspension mechanism (4).

4. The special thread sealing surface measuring device according to claim 3 is characterized in that: The image collector (5) is a camera.

5. The special thread sealing surface measuring device according to claim 3 is characterized in that: It also comprises a data acquisition and digital display module (6), wherein the image acquisition device (5), the movable probe (2) and the fixed probe (3) are respectively connected to the data acquisition and digital display module (6) by wireless communication, and the data acquisition and digital display module (6) is used for communication connection with a terminal device.

6. The special thread sealing surface measuring device according to any one of claims 1 to 5, characterized in that: The movable measuring head (2) and / or the fixed measuring head (3) are respectively in the form of a disc.

7. The special thread sealing surface measuring device according to any one of claims 1 to 5, characterized in that: The movable probe (2) and the fixed probe (3) are respectively provided with micrometers.

8. The special thread sealing surface measuring device according to any one of claims 1 to 5, characterized in that: The movable measuring head (2) and the fixed measuring head (3) are respectively embedded with pressure sensors.

9. The special thread sealing surface measuring device according to claim 8, characterized in that: The pressure detection range of each pressure sensor is 1-10N.

10. A special thread sealing surface measurement method, characterized in that: The method is implemented by using the special thread sealing surface measuring device as described in any one of claims 1 to 9, and comprises the following specific steps: The movable probe (2) and the fixed probe (3) are respectively placed on both sides of the thread surface of the petroleum pipe (7), and the movable probe (2) and the fixed probe (3) are respectively fitted with the two sides of the thread surface of the petroleum pipe (7), and the distance between the two sides of the thread surface of the petroleum pipe (7) is obtained through the movable probe (2) and the fixed probe (3).

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